The Devils Marbles (Karlu Karlu), Northern Territory, Australia Royalty-Free Stock Photo

The Devils Marbles are huge granite boulders scattered across a wide, shallow valley, 100 kilometres south of Tennant Creek in the Northern Territory, Australia. The Devils Marbles are located in the traditional country of the Warumungu, Kaytetye, Alyawarra and Warlpiri people. They call the Devils Marbles, Karlu Karlu, which literally translates as ‘round boulders'. Formed by erosion over millions of years, the Devils Marbles are made of granite, which surfaces like an island in the desert. They vary in size, from 50 centimetres up to six metres across. Many of the giant stones are precariously balanced on top of one another, appearing to defy gravity. They continue to crack and erode today, creating an ever-changing landscape.